Please add up these figures immediately and tell me the answer.
请立刻把这些数字加起来并告诉我答案。
The simply answer is the sellers will add selections to the categories faster than ourselves.
简单的答案是销售商会比我们更快地增加,这些领域中的选择。
They take the answer back to their cave and add it to the pile of opinions.
他们把这些答案带回自己的窠臼中堆砌起来。
But then having found one answer, you can add to it anything that gets killed by the act of taking derivatives.
一旦你算出了一个答案,你就可以往式子里加入任何,在求完导后消失的项
Everyone knows from calculus that if you're trying to find a function about which you know only the derivative, you can always add a constant to one person's answer without changing anything.
学过微积分的人都知道,如果你想根据已知的导数,求出其原函数,你总是可以给某人的答案,随便加一个常数,且不影响结果
You can add something else to the answer without invalidating it, and that is anything with one power of t in it, because if you take one derivative it'll survive, but if you take two derivatives, it'll get wiped out.
你可以往答案后面加上其它东西,而且不影响结果,也就是任何t的一次项,因为你求一次导数之后它还在,但如果你求两次导数,这一项就不存在了
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